
.middle > div {

    border: 1px solid red;
}


/*-----------中间内容----------*/
.content > div:nth-child(1) {
    text-align: center;
    margin: 40px 0;
}

.content > div:nth-child(1) > div:nth-child(1) {
    display: flex;
    align-items: center;
    justify-content: center;
}

.content > div:nth-child(1) > div:nth-child(1) > div:nth-child(1) {
    color: rgb(230, 145, 55);
    font-size: 30px;
    line-height: 30px;
}

.content > div:nth-child(1) > div:nth-child(1) > div:nth-child(2) {
    color: gray;
    font-size: 20px;
    line-height: 30px;
}

/*---------------liuyan--------------------*/
.content > div:nth-child(2) {
    display: flex;
    justify-content: center;
}

.content > div:nth-child(2) > div {
    /*border: 1px solid red;*/
    width: 600px;
}

.online > div > div:nth-child(1) {
    line-height: 40px;
}

/*.online > div > div:nth-child(2) {*/
/*    line-height: 30px;*/
/*    height: 30px;*/
/*    background-color: rgb(238, 238, 238);*/
/*    border: 1px dashed gray;*/
/*    padding: 5px 10px;*/
/*}*/
/*.online > div:nth-child(3) > div:nth-child(2){*/
/*    height: 100px;*/
/*    line-height: 20px;*/
/*}*/

/*自定义属性,可以不要值*/
input[text], textarea {
    width: 600px;
    line-height: 30px;
    height: 30px;
    background-color: rgb(238, 238, 238);
    border: 1px dashed gray;
    padding: 5px 10px;
}

textarea {
    height: 100px;
    line-height: 20px;
}

form > div:nth-child(2) {
    display: flex;
    justify-content: center;
}

input[type=submit] {
    color: white;
    background-color: rgb(230, 145, 55);
    padding: 5px 30px;
    margin: 30px;
    border: none;
    cursor: pointer;
    border-radius: 10px 20px 30px 40px;
    text-shadow: 2px 2px red;
    box-shadow: 10px 10px grey;
}
